Sullivan Patches consists out of two reefs perpendicular to each other and the complete site is too large to see everything with one dive. In the early 1980s there was a crown of thorn starfish outbreak and they literally ate the reef. The coral took years to grow back, but now it has succeeded and nothing can be seen any more of the enormous apatite of the starfish.

It has clear and deep waters all around and a shallow reef top, which are excellent conditions for marine life and prolific coral growth. Large fish such as hammerheads and manta rays are seen occasionally, it is the many smaller fish that are interesting.